var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
const jwt = require('jsonwebtoken');

// 加载路由模块
var index = require('./routes/index');
var users = require('./routes/users');
var shopApi = require('./routes/api/shopApi');
var foodApi = require('./routes/api/foodApi');
var userApi = require('./routes/api/userApi');

// 加载常量信息
var mainCons = require('./models/constants/mainCons');

var app = express();

// 解决跨域问题
app.all('*', function (req, res, next) {

    // 用户Token验证
    let {token}= req.body || req.query;
    jwt.verify(token, mainCons.token, function (err, decoded) {
        req.tokenInfo = {
            err,
            decoded
        };
    });

    res.header('Access-Control-Allow-Origin', '*');
    next();
});

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: false}));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

// 使用路由模块
app.use('/', index);
app.use('/users', users);
app.use('/api/shop', shopApi);
app.use('/api/food', foodApi);
app.use('/api/user', userApi);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

// error handler
app.use(function (err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};

    // render the error page
    res.status(err.status || 500);
    res.render('error');
});

module.exports = app;
